Eli Lil­ly’s Alzheimer’s drug clears more amy­loid ear­ly than Aduhelm in first-ever head-to-head. Will it mat­ter?

Ahead of the FDA’s de­ci­sion on Eli Lil­ly’s Alzheimer’s drug do­nanemab in Feb­ru­ary, the Big Phar­ma is drop­ping a first cut of da­ta from one of the more in­ter­est­ing tri­als — but less im­por­tant in a reg­u­la­to­ry sense — at an Alzheimer’s con­fer­ence in San Fran­cis­co.

In the un­blind­ed 148-per­son study, Eli Lil­ly pit­ted its drug against Aduhelm, Bio­gen’s drug that won FDA ap­proval but lost Medicare cov­er­age out­side of clin­i­cal tri­als. No­tably, the study didn’t look at clin­i­cal out­comes, but rather the clear­ance of amy­loid, a pro­tein whose buildup is as­so­ci­at­ed with Alzheimer’s dis­ease, in the brain.

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